When I was in college many years ago, a friend of mine down the hall pulled an all-nighter. A critical term paper was due the next day, and he stayed up until 6 A.M. banging away on his Macintosh. Finally, bleary-eyed, he turned off the computer and tried to catch a couple of hours of sleep before the paper was due.
He turned off the computer.
Notice I didn't say that he saved his work and turned off the computer. At 6 A.M., he forgot about that little thing.
At about 7:45 A.M., he came knocking on my dorm room door in despair. "Um, you know computers," he was practically crying. "Can't I get my paper back?"
"You didn't save it at all?" I asked.
"Never? All night long you never once hit Save?'" ...